Struct PrometheusMetrics 

pub struct PrometheusMetrics {
    pub requests_total: LabeledCounter,
    pub request_duration_seconds: LabeledHistogram,
    pub active_connections: Counter,
    pub bytes_total: LabeledCounter,
    pub errors_total: LabeledCounter,
    /* private fields */
}

Prometheus-compatible metrics

Fields

requests_total: LabeledCounter

Request counter by method

request_duration_seconds: LabeledHistogram

Request latency histogram by method

active_connections: Counter

Active connections gauge

bytes_total: LabeledCounter

Bytes transferred counter (by direction: “in” or “out”)

errors_total: LabeledCounter

Error counter by type

Implementations

impl PrometheusMetrics

pub fn new(config: MetricsConfig) -> Self

Create new Prometheus metrics

pub fn with_defaults() -> Self

Create with default configuration

pub fn record_request(&self, method: &str, duration: Duration)

Record a request

pub fn record_error(&self, error_type: &str)

Record an error

pub fn record_bytes(&self, direction: &str, bytes: u64)

Record bytes transferred

pub fn connection_opened(&self)

Increment active connections

pub fn connection_closed(&self)

Decrement active connections (using a separate counter for simplicity)

pub fn config(&self) -> &MetricsConfig

Get configuration

pub fn format_prometheus(&self) -> String

Format metrics in Prometheus text format

Trait Implementations

impl Default for PrometheusMetrics

fn default() -> Self

Returns the “default value” for a type.